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Table 1 Crystalline (cellulose I or cellulose IIII) and amorphous cellulose contents (measured by XRD) of samples prepared from Avicel PH 101 after ammonia treatment at different final temperatures

From: Effects of alkaline or liquid-ammonia treatment on crystalline cellulose: changes in crystalline structure and effects on enzymatic digestibility

Sample number - Figure 2 NH3treatment conditions Amorphous content (%) Cellulose allomorphs (CI, %) Crystallite size (Å)
    I IIII  
(g) Controla 26 74 (1.2) - 46 (1.1)
(f) -33°C 57 - 43 20
(e) 25°Cb 46 - 54 38
(d) 25°C 36 - 64 42
(c) 105°C 35 - 65 49
(b) 130°C 26 - 74 55
(a) 140°C 22 - 78 57
  1. aValues for control (Avicel PH-101) were measured three times and the numbers in parentheses indicate the standard deviation; bNH3 treatment at 25°C for 5 min. CI: crystallinity index; XRD: X-ray diffraction.